Results 71 to 80 of about 2,563,144 (300)

Inferring the demographic history and rate of adaptive substitution in Drosophila [PDF]

, 2006
An important goal of population genetics is to determine the forces that have shaped the pattern of genetic variation in natural populations. We developed a maximum likelihood method that allows us to infer demographic changes and detect recent positive ...
Stephan Wolfgang, Li, Haipeng, Stephan, Wolfgang, Wolfgang Stephan, Li Haipeng, Haipeng Li   +5 more
core   +2 more sources

Polymorphism of peripheral blood T cell receptor β chain variable region in patients with clinically isolated syndrome

Chinese Journal of Contemporary Neurology and Neurosurgery, 2020
Objective To investigate the polymorphism of T cell receptor β chain variable region (TCRVβ) in peripheral blood of clinically isoiated syndrome (CIS) patients. To preliminarily predict the specific TCRVβ fragment of CIS and its diagnostic value for CIS.
Yan WU, Ji⁃hong ZHANG, Hui⁃qing DONG, Da⁃wei LI, Zheng LIU, Sui⁃gui WAN   +5 more
doaj  

Polimorfismo genético de la apolipoproteína E en un grupo de escolares del centro-oriente colombiano: comparación con las concentraciones plasmáticas de lípidos y apolipoproteínas

Biomédica: revista del Instituto Nacional de Salud, 2007
Introducción. Estudios mundiales han demostrado la contribución de los alelos de la apolipoproteína E en las variaciones de los lípidos y las apolipoproteínas. Objetivo.
Ney Callas, Elpidia Poveda, César Baracaldo, Patricia Hernández, Carlina Castillo, Martha Guerra   +5 more
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Genetic Normalization of Differentiating Aneuploid Human Embryos [PDF]

, 2011
Early embryogenesis involves a series of dynamic processes, many of which are currently not well described or understood. Aneuploidy and aneuploid mosaicism, a mixture of aneuploid and euploid cells within one embryo, in early embryonic development are ...
Paul Brezina, Raymond Anchan, Kevin Richter, Ric Ross, Andrew Benner, William Kearns, Andrew Barker, Khanh-Ha Nguyen, Garry Cutting   +8 more
core  

Leishmania major: genetic heterogeneity of Iranian isolates by single-strand conformation polymorphism and sequence analysis of ribosomal DNA internal transcribed spacer.

, 2006
Protozoan parasites of Leishmania major are the causative agents of cutaneous leishmaniasis in different parts of Iran. We applied PCR-based methods to analyze L.
Mauricio, Isabel L, Al-Jawabreh, Amer, Alimohammadian, Mohammad Hossein, Tashakori, Mahnaz, Kuhls, Katrin, Farajnia, Safar, Schönian, Gabriele   +6 more
core   +1 more source

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

FEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez, Diana Ascencio, Miguel Vallebueno‐Estrada, Eduardo González‐Orozco, Christian Eduardo Martínez‐Guerrero, Rafael Montiel, Alexander DeLuna   +6 more
wiley   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

Aging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Cholesterol Ester Transfer Protein Taq1B Polymorphism and Its Association with Cardiovascular Risk Factors in Patients Undergoing Angiography in Yazd, Eastern Iran: A Cross-Sectional Study [PDF]

Iranian Journal of Medical Sciences
Background: Several studies assessed the relationship between the cholesterol ester transfer protein (CETP) Taq1B gene polymorphism (rs708272) with risk factors of cardiovascular diseases (CVDs). However, their findings were inconsistent.
Azam Ahmadi-Vasmehjani, Seyed Mostafa SeyedHosseini, Sayyed Saeid Khayyatzadeh, Farzan Madadizadeh, Mahta Mazaheri-Naeini, Mahdie Yavari, Zahra Darabi, Sara Beigrezaei, Marzieh Taftian, Vahid Arabi, Maryam Motallaei, Amin Salehi-Abargouei, Azadeh Nadjarzadeh   +12 more
doaj   +1 more source

Inverse correlation of population similarity and introduction date for invasive ascidians. [PDF]

PLoS ONE, 2008
The genomes of many marine invertebrates, including the purple sea urchin and the solitary ascidians Ciona intestinalis and Ciona savignyi, show exceptionally high levels of heterozygosity, implying that these populations are highly polymorphic. Analysis
Nathan Silva, William C Smith
doaj   +1 more source